Comparation of the Occurrence of Plasma Irregularities in the Equatorial Electrojet Over the Brazilian and Peruvian Sectors

Equatorial electrojet (EEJ) observations using VHF radars show backscattered echoes from two types of electron density irregularities, Type 1 and Type 2. In this paper, we present a statistics of occurrence irregularities in the ionospheric plasma at the e-region hight, observed by a 50 MHz coherent backscatter radar installed in Brazil and the radar installed in Jicamarca Radio Observatory. These radars detect small-scale irregularities (3 meters) between approximately 90 to 130 km heights in the equatorial ionosphere.